6fw Weld
Nubar Vance
I recently presented a program at the NC Arboretum on weld (Reseda luteola). There is a growing interest in natural dyes in our local region and I was hoping to inspire dyers to begin growing their own. A few days before the program, I was asked by a local dyer why I was not talking about native plants such as broom straw or goldenrod, which were both seasonably available at that time. It was a good question. It question deserved some serious thought.
I then created a datum point on the mating surface. Spot Weld will not allow me to select this point. I tried creating a datum point on the fly, when I hit resume on the spot weld dashboard, the point was not selected.
I am having this same issue with Creo 5.0.5.
My datum point has been created in an assembly by intersecting two datum planes and an outer (top) surface of the weld. The two faces being welded together are coincident to one another.
What am I doing wrong?
I don't use the weld module. However, from the other messages in this thread, It sounds like the datum point has to be "on surface" for it to be usable for the spot-weld feature. Can you show the screenshot of how this point feature is defined?
The point is defined as the intersection of 2 datum planes and the surface on which the weld is to occur.
It is defined within the part in the attached image, but I have also defined it in the assembly itself and that did not change anything. I have also attempted defining each spot weld point as it's own point (in the model tree), rather than a point within a grouping with other points. This also did not change the behavior.
IF I use offsets like you've shown, it does work.
Why am I not surprised to learn of yet another CREO idiosyncrasy that IS NOT DOCUMENTED ANYWHERE. CREO's help file says "make a point" - it does not say "make a point using offsets." CREO seems to be in denial of their shortcomings.
What a silly, silly, silly way to have to do things.
Yeah, for sure things could be improved. Often in Creo, there is very little to guide the user through the process. I also find that PTC help files are a bear to process because of lack of examples and illustrations.
Also, note that similar "silliness" is present when modeling holes in part mode. Datum points defined "on surface" with offset method can be used to place the hole feature directly on that surface. Otherwise, the system will require you to specify the surface to be drilled (even though that surface is used to constrain the 3D location of the hole placement point).
Thank you for the insight into the Hole feature behavior.
I do not see a way to mark the response as the solution - Probably because I am not the original poster of the question?
Perhaps the @PTCModerator will see this and can mark the response accordingly? I have provided kudos and added the "SOLVED" tag to the appropriate responses.
Thanks again!
I have added fillet welds to an assembly. I have learned to use the fillet and groove commands to place the welds. The fillet appears as a flat smooth surface making it difficult to distinguish from the parent surfaces. Can I give the weld surface a "beaded" appearance to look like an actual weld?
That is exactly what I am looking for . . . . did not realize how much work is involved. I will give it a shot anyway. Still learning and it will give me some practice using various commands. This is only for looks . . . just curious as to how it is done. Thanks for the info.
That may be the cause then...
If you want to change the material for the weld after having converted the assembly, you need to right-click on "welds" and select the iProperties > Physical tab where you have the material dropdown.
Did you ever get this figured out where you wanted the weld bead to be elevated above the surface like it is in the real world? I am doing basically a butt weld, chamfered out the edges and then did a groove weld and got the weld "appearance" but it's smooth to the surface, but that's not what its like in the real world, should be a half round/oval above the part. does it on fillet welds. Please let me know. Thanks
If it is just curves, you can turn points on and drag one end curve point to the other. If you need the in-between area like in T-Splines when you select both points first then hit the Z key, I would probably draw a straight line between the ends I want to join, then turn on points for both curves and drag one to midpoint of the straight line then drag the other curve end point to the first (line midpoint) curve.
If you really need the weld, then alt drag your curves up with T-Splines arrow to create a t-splines surface, weld the points, convert surface to NURBS then duplicate edge. This will give you the welded lines. But that is more work & more geometry that what I suggested.
If the lines are coplanar you can use the Fillet command with the fillet diameter set to 0. It will extend (or shorten) one or both of the lines until they intersect. There is an option to have them joined as well.
Nick
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